Im probably setting myself up for a smackdown, but so be it .. As a 54 year old bass player, I dont have a lot of experience w/ twelves, but after a lifetime of experience with fifteens, I have been convinced to try a pair of 1-12 cabs for my next rig and believe that it will offer me the flexibility and sound that I am after. The problems start when I try to describe the sound I am after; think reggae/dub only I dont play that style of music. I play a lot of post war blues and early / mid sixties R&B with no high end coming from the bass. Similar to the way the Beatles made their records, I work hard with my guitar players to open up my own slice of the frequency range, so I can be easily heard in the mix without resorting to adding mids/highs to cut through. To make it completely clear, I use a 64 P-bass and an old Ampeg portaflex for all recording, and I have the tone control on the P-bass completely off and the treble on the Ampeg at around 10 oclock. (using ten year old strings) The reason I am willing to put in the effort and money to purchase a very good quality bass rig for live use is because I understand that it is not easy to reproduce this kind of all woof bass tone with enough clarity to hear the notes I am playing . Getting this type of tone in the studio is comparatively easy (as long as the guitar players dont insist on low end guitar sounds fortunately that seems to be a quirk of modern / young guitarists) But it can be a challenge live, especially when the soundman thinks he is doing us a favor by creating a thunder of the gods drum sound. But assuming the sound guy gets it its up to me to produce a deep, articulate woof. A handful of the new, engineered cabinet designs from Barefaced, Greenboy and BFM can be ordered with NO tweeter or midrange, and they seem like they were designed with someone like me in mind, only perhaps someone not quite as extreme. But it is that last 10% or so that has kept me from purchasing one of these cabs. (of course, the fact that all three of these companies are very small, with no opportunity to try out the cabinets prior to purchase, only complicates matters) Ths single cabinet that seems to come closest to the sound I am after is the Barefaced Dubster (based solely on written description no opportunity to actually try one). But I would need to achieve that sound with two 1-12s instead of the Dubsters 2-15 cab. I fully understand the statement by various authorized builders that they will not modify the Greenboy designs (and similar warnings from Mr. BFM to not deviate from his plans.) And Barefaced is too busy to develop a half-dubster that only I am interested in. A pair of BFM Jack 12s would be one option, but the spike at 2.5kHz on the recommended 2512 (and to a lesser extent, the 3012HO) is just what I am trying to avoid. Is it possible to modify the Jack 12 design to allow the use of the 3012lf? Greenboy offers one model that could work without modification, the 12 Sub, but as it is intended for PA sub use, the cabinet is very deep. As I dont need ANY response below 40hz, I was hoping a 3012lf equipped Bassic 12 might work and be a lot easier to drag around town; especially a pair of them. If I could successfully configure a pair of 1-12 cabinets from any one of these three companies based on the Eminence Kappa Lite 3012LF with no mid or high end drivers, I could finally place my order and get back to the music. Any suggestions?